CN104560371A - Oil tea seed cold pressing technique - Google Patents

Abstract

The invention relates to an oil tea seed cold pressing technique which comprises the following steps: selecting oil tea seed, drying, shelling, drying, crushing, carrying out cold pressing, filtering, hydrating, degumming, carrying out medium temperature drying, refrigerating to crystallize, and filling. The product quality is controlled from the raw material acquisition and raw material storage time, and the fresh seed fresh pressing and low-temperature low-pressure conditions are creatively used in the process, thereby ensuring the control on the raw oil acid number and no loss of nutrients to some extent, and enhancing the raw oil quality and the utilization value of the tea cake for byproduct deep processing. The refrigeration crystallization and activated carbon adsorption are utilized to remove the harmful substances in the oil, and the inherent characteristics and nutrients in the oil tea seed oil are effectively maintained, thereby greatly improving the oil quality. The inert gas charging process is adopted to enhance the preservation period and stability of the oil and avoid using additives, thereby ensuring to use the physical production method in the overall process.

Description

A kind of tea seed cold pressing process

Technical field

The present invention relates to a kind of tea seed cold pressing process.

Background technology

Oil tea originates from China, is the distinctive main woody edible oil material seeds of south China, one of large woody edible oil material seeds in the Ye Shi world four, China's camellia oleifera lam area account for woody edible oil charge level long-pending more than 80%.The oil obtained from tea seed is tea oil, and the lipid acid composition of tea oil is similar to table oil fat-sweet oil, and its unsaturated fatty acid content, more than 80 %, has very high nutritive value; In oil tea planting process not to fertilize and agricultural chemicals, therefore tea oil belongs to natural green food.Several functions composition in tea oil, for the function maintaining cardiovascular systems, improve body immunity, reduce cholesterol, prevention and therapy hypertension has obvious effect.In addition, traditional medicine is thought, the effect that tea oil has clearing away heat and eliminating dampness, desinsection to detoxify, and energy clearing stomach ease constipation, can control eruptive disease stomachache, acute roundworm obstructive intestinal obstruction etc.

At present, the preparation method that China produces camellia seed oil mainly contains machinery pressure hot moulding method and solvent extraction method, and milling process equipment is many, and fat residue rate is high, and conventional high-temperature hot moulding tea oil easily makes VITAMIN isoreactivity material be damaged.Lixiviation process uses 6# solvent, although it is low to have cost, the advantage that oil yield is high, organic solvent exists potential safety hazard, and the solvent gas of release is unfriendly to environment.Therefore, reduce heat treatment step in fats and oils processing, do not use the method for solvent by demand.Low-temperature cold pressing method is that entering to squeeze temperature is normal temperature or a little more than normal temperature without steaming the pyroprocessing such as stir-fry before entering to squeeze; Cold press avoids some colloids, impurities dissolves in crude oil, and the method retains active substance and the fragrance of tea oil to greatest extent, and the cold press tea oil quality better of production, reduces production cost.

Summary of the invention

To the superheated of oil plant and too much chemical treatment in tradition processing, reduce conventional high-temperature and add that the objectionable impurities produced man-hour is residual and Oil processing cost is high, poor quality, the defects such as added value is low, provide a kind of tea seed cold pressing process.

Technical scheme of the present invention is: a kind of tea seed cold pressing process, comprises the following steps:

1) choose tea seed, remove wherein impurity, obtain pure tea seed;

2), raw material stoving, adopt vertical drying tower, thermal source the adopts hotblast stove hot wind supply that is fuel with organic energy, hot blast temperature controls at 55 DEG C-65 DEG C, and the dried moisture controlled of tea seed is at 7.5%-9%;

3) shell: by the shelling of the tea seed of gained in step (2), obtain the camellia seed kernel of certain shell-containing rate;

4) oven dry, fragmentation: gained tea seed in step (3) is inserted 60 DEG C of baking ovens and dries, tea seed be dried to moisture content be less than 8 % after take out carry out break process, adopt roll crusher to carry out fragmentation to tea seed, controlled fragmentation degree is to tea seed 1/4 ~ 1/8 lobe;

5) low temperature pressing, low temperature cold squeezing adopts duplex low-temperature oil expeller, and loading frequency is set to 8 to 10 hertz, squeezes bore temperature and is arranged on less than 70 DEG C, and squeezing crude oil goes out bore temperature below 50 DEG C;

6) filter: by the crude oil after squeezing by after the larger solid particulate of pure natural filter-cloth filtering, under 9-10 DEG C of low temperature, adopt filter opening to carry out multi-filtering by 60 orders, 80 orders, 100 object filter screens successively;

7) hydration degum, will go out thorax crude oil heating temperatures at 60 DEG C-75 DEG C, add the salt solution that concentration is 5%, and salt water consumption is the 4%-6% that oil is heavy, and brine temp is than oil temperature height 5-10 DEG C;

8) middle temperature is dried, is heated to 140 DEG C by the camellia seed oil after hydration degum and carries out middle temperature is dried to 180 DEG C;

9) freezing and crystallizing, is down to 6-10 DEG C by the camellia seed oil temperature after middle temperature is dried, keeps this temperature 10-12 hour growing the grain, adds gac simultaneously, carry out low rate mixing;

10) after again filtering, filling.

Beneficial effect of the present invention: from the collection of raw material and the control of quality product the raw material storage time, creationary fresh for fresh seed squeezing and low-temp low-pressure are run through wherein, not running off of the control that ensure that crude oil acid value to a certain extent and nutritive ingredient, the quality and the tea cake that improve crude oil carry out byproduct deep processing and utilization value simultaneously.Adopt freezing crystallization and charcoal absorption, both eliminated the objectionable impurities in oil plant, make again the natural characteristics of camellia seed oil and nutritive ingredient obtain effective reservation, substantially increase the quality of oil.Adopt the method for filling with inert gas, both improve freshness date and the stability of oil, and stopped again the use of additive, ensure that whole process uses physical production method.

Embodiment

A kind of tea seed cold pressing process, comprises the following steps:

1) choose tea seed, remove wherein impurity, obtain pure tea seed;

2) dry, adopt vertical drying tower, the hotblast stove hot wind supply that it is fuel with organic energy that thermal source adopts, hot blast temperature controls at 55 DEG C-65 DEG C, and the dried moisture controlled of tea seed is at 7.5%-9%;

3) shell: by the shelling of the tea seed of gained in step (2), obtain the camellia seed kernel of certain shell-containing rate;

4) oven dry, fragmentation: gained tea seed in step (3) is inserted 60 DEG C of baking ovens and dries, tea seed be dried to moisture content be less than 8 % after take out carry out break process, adopt roll crusher to carry out fragmentation to tea seed, controlled fragmentation degree is to tea seed 1/4 ~ 1/8 lobe;

5) low temperature pressing, low temperature cold squeezing adopts duplex low-temperature oil expeller, and loading frequency is set to 8 to 10 hertz, squeezes bore temperature and is arranged on less than 70 DEG C, and squeezing crude oil goes out bore temperature below 50 DEG C;

6) filter: by the crude oil after squeezing by after the larger solid particulate of pure natural filter-cloth filtering, under 9-10 DEG C of low temperature, adopt filter opening to carry out multi-filtering by 60 orders, 80 orders, 100 object filter screens successively;

7) hydration degum, will go out thorax crude oil heating temperatures at 60 DEG C-75 DEG C, add the salt solution that concentration is 5%, and salt water consumption is the 4%-6% that oil is heavy, and brine temp is than oil temperature height 5-10 DEG C;

8) middle temperature is dried, is heated to 140 DEG C by the camellia seed oil after hydration degum and carries out middle temperature is dried to 180 DEG C;

9) freezing and crystallizing, is down to 6-10 DEG C by the camellia seed oil temperature after middle temperature is dried, keeps this temperature 10-12 hour growing the grain, adds gac simultaneously, carry out low rate mixing;

10) after again filtering, filling.

Claims (1)

1. a tea seed cold pressing process, comprises the following steps:

1) choose tea seed, remove wherein impurity, obtain pure tea seed;

2) raw material stoving, adopts vertical drying tower, the hotblast stove hot wind supply that it is fuel with organic energy that thermal source adopts, and hot blast temperature controls at 55 DEG C-65 DEG C, and the dried moisture controlled of tea seed is at 7.5%-9%;

3) shell: by the shelling of the tea seed of gained in step (2), obtain the camellia seed kernel of certain shell-containing rate;

4) oven dry, fragmentation: gained tea seed in step (3) is inserted 60 DEG C of baking ovens and dries, tea seed be dried to moisture content be less than 8 % after take out carry out break process, adopt roll crusher to carry out fragmentation to tea seed, controlled fragmentation degree is to tea seed 1/4 ~ 1/8 lobe;

5) low temperature pressing, low temperature cold squeezing adopts duplex low-temperature oil expeller, and loading frequency is set to 8 to 10 hertz, squeezes bore temperature and is arranged on less than 70 DEG C, and squeezing crude oil goes out bore temperature below 50 DEG C;

6) filter: by the crude oil after squeezing by after the larger solid particulate of pure natural filter-cloth filtering, under 9-10 DEG C of low temperature, adopt filter opening to carry out multi-filtering by 60 orders, 80 orders, 100 object filter screens successively;

7) hydration degum, will go out thorax crude oil heating temperatures at 60 DEG C-75 DEG C, add the salt solution that concentration is 5%, and salt water consumption is the 4%-6% that oil is heavy, and brine temp is than oil temperature height 5-10 DEG C;

8) middle temperature is dried, is heated to 140 DEG C by the camellia seed oil after hydration degum and carries out middle temperature is dried to 180 DEG C;

9) freezing and crystallizing, is down to 6-10 DEG C by the camellia seed oil temperature after middle temperature is dried, keeps this temperature 10-12 hour growing the grain, adds gac simultaneously, carry out low rate mixing;

10) after again filtering, filling.